Serena Williams won her 19th major title Saturday at the Australian Open to move into a tie with Helen Wills Moody in third place on the all-time list. We rewind all 19 Grand Slam titles in Williams' historic career.

Two-time champion Victoria Azarenka continued her comeback from a foot injury with a convincing 6-3, 6-2 win over Sloane Stephens on Tuesday and next will have to play US Open finalist Caroline Wozniacki, who beat 18-year-old Taylor Townsend 7-6 (1), 6-2.

The US Open's young upset artist finished 2014 as the No. 1 junior and says she's got her game back in order. Still, the 15-year-old is skipping the Australian Open this month and mulling her timetable for turning pro.

Caroline Wozniacki may hold the title for tennis' most decorated runner after her impressive New York City Marathon, but Serena Williams gave her bestie a run (get it?) for her money over the weekend. Not only did the reigning US Open champ participa...